Electric pocket-lamp



C. BOLTSHAUSER.

ELECTRIC POCKET LAMP.

APPLICATION FILED 0cT.23,1917.

1,327,017, Patented Jan. 6, 1920.

UNITED STATES PATENT oFFIoE.

GONBA ID BOLTSHAUSER, OI: ZURICH, SWITZERLAND, ASSIGNOR TO G., OF ZURICH, SWITZERLAND, A SWISS GOMPAN Y.

\ ELECTRIC POCKET-LAMP.

' Patented Ja'n.6, 1920.

Application filed October 23, 1917. Serial No. 198,068.

To all whom it may concern:

Be it known that I, CONRAD BoLTsHAUsER, a citizen of the Swiss Confederation, residing at Zurich, Switzerland, have invented a new and useful Electric Pocket-Lamp, of which the following is a specification.

This invention relates to electric pocketlamps in a circularv casing with centrally disposed countersunk bulb, in combination with an internal battery of loosely superposed couples of fiat and equally sized annull, and

insulated springs fast in the casing to form contact and press said couples against the top wall of the casing. a

, The annexed drawing illustrates my invention by way of example.

- Fi ure 1 is a vertical section on line (t-a of Fig.3; Fig. 2, a sectional elevation on line be-b of Fig.

I 1;Fig. 3, an elevation; Fig. 4 a plan of Fig. 1; and, Fig. 5, minternal view of-the cover of the casing.

The pocket lainp here shown has a circular box-shaped casing 1 of metal and box-' I cover 2 secured by bayonet locks 3 and 4 of dicated by a casing 1, while the zinc electrode is isolated v two oppositely placed studs 3 fixed to part 1, and two corresponding slots 4: in part 2, see Fig. 3. In the casing 1 is lodged a battery of three superposed elements I, II, III, in-

sists of a dished zinc electrode 6 containing pasty electrolyte 7 insulated from the zinc.

he carbon electrode 8 rests on'the electrolyte but'is insulated from. the zinc. Adjacent couples are in contact zinc to carbon.

The carbon electrode 8 of couple I is in touch with the inner face of the-top wall 1' of the hollow plu serted whic the up or portion and formed with a short 2'. e. everywhere separated from the casing 1. In the space 5 of the battery an insulatmg 9, of wood for example, is inhas a central bore enlarged at screw-t read at its portion nearest the enlargement. The center of the top walll is provided with a funnel-shaped attachment 10 which is seated in the enlargement of the plug 9 and has a screw-threaded portion to engage in the'threads of said plug and also 'to receive the screw-threaded mounting 11 of the lamp 12. The latter is inelectrical contact, through the funnellO and wall 1',

ots and dashes in Fig. 5, which form a central chamber 5. Each couple conblades 17 which press against the coupleI I and keep the three couples in contact with each other. The springs 17 are held in position by insulatin straps 18, for example of leather, fixed to t tween the said springs, dial slot 19 in the wall the cover '2, there is a slider 20 of insulating material fitted with a metal arm 21 whose end portion, fixed to the slider, bears against the zinc electrode 6 of couple III and serves as a make and break contact for the lamp accordin to the forward. or rearward position 0 the slider 20. Operation of the sliding contact is eifected externally by means of a knob 22 on the wall2'. Figs. 2 and 5 show the contact closed, the free end of arm 21 being in touch with the contact 23 of the lamp-mounting 11.

The battery of the pocket lamp may comprise more than three couples. If a fourth couple be desired, the box-cover '2 can have other slots 4. (in pairs) of difierent lengths so as to enable the box to be adjusted according to the length required. Thecontact arm 21 can be bent so as to meet the contact 23 which maybe more or less distanced from the wall 2'.

I claim: An electric poc etlamp having a circular casin with a centrally disposed countersunk ulb, in combinatlon with an internal comrm rnonsus,

e wall 2 of cover 2. Beand moving in a 'ra- 2' and plate 2" of' battery composed of loosely superposed I couples offlat and equally sized annuli, and

insulated s rings fast in the casing to form contact: an press the said cou les against ;means for 

